工芸基礎知識（選択問題）20180619
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工芸基礎知識（選択問題）20180619 次のポンプのうち、主な回転部品で軸方向力を特別な方法でバランスさせる必要がないものは 。 A. 単吸遠心ポンプ B. スクリューポンプ C. 単側流路開放型渦巻きポンプ D. 双吸遠心ポンプ
D．両吸遠心ポンプ:):)
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